This is a rhombus and in any rhombus, the diagonals intersects in the middle and they are perpendicular:
So all 4 triangles are right triangles and the sides are the hypotenuses.
1st) Calculate the sides: hypotenuse² = 3² + 4² = 25, and hypotenuse = 5
The area of each right triangle is (4 x 3)/2 = 6 units²
And the area of the 4 right triangles = 4 x 6 = 24 init²
Answer:
∠ABC = 100°
∠ADF = 100°
Step-by-step explanation:
(8x + 4)° = (10x - 20)°
(2x)° = 24°
x = 12°
Compute, knowing that x = 12°
8x + 4 = 8 · 12 + 4 = 100°
10x - 20 = 10 · 12 - 20 = 100°
Answer:
7.5 is the answer you are looking for